<template>
  <div>
    <ul>
      <li v-for="(item, index) in myArr" :key="index">{{ item }}</li>
    </ul>
    <button @click="btnFn">爬</button>
  </div>
</template>

<script>
export default {
  data() {
    return {
      myArr: ["帅哥", "美女", "程序猿"],
    };
  },
  methods:{
    btnFn(){
      this.myArr.push(this.myArr[0])
      this.myArr.shift(this.myArr[0])
    }
  }
};
</script>

<style>
</style>